When the principal diagnosis is one of these 23 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
E24.0
E24.2
E26.9
E30.9
E34.1
E34.50
E34.9
E24.3
E24.4
E24.8
E24.9